Seal



Patented July 13, 1937 UNITED STATES .PATENT oFFl-CE 3 Claims.

This invention relates to a lubricant seal such as is adapted to bepositioned within a tubular housing about a rotatable shaft forpreventing grease, oil or other lubricant from flowing be- 5 tween theshaft and the housing.

vAn object of the invention is to provide a selfcontained sealing unitwhich is extremely sim- .plein construction, can be manufacturedinexpensively from a minimum number of parts and 0 which will withstandthe most severe usage and will effectively prevent any seepage of oil.

Another object of the invention is to provide a seal retaining memberhaving a positioning flange for retaining a coil spring about an axiallyextending flange of the sealing member.

Otherobjects and advantages of the invention will be more apparent fromthe following description taken in connection with the accompanyingdrawing in which: v

Fig. 1 is an end view of the seal shown in Fig. 2 taken on the line I-Iof Fig. 2, parts being broken away and in section.

Fig. 2 is a sectional View through a. housing equipped with a sealembodying the invention,

K showing the seal partly in section and partly in 30 ing the outer Wallfor the seal and which may be pressed into an opening I4 .in a housinglsurrounding 'a rotating shaft I6.

Within the annular space formed by the outer wall I2 I have provided apliable sealing ring I8, preferably formed of leather, a metallic spacerring 20, a metallic locking washer 22, and an endless coil pressurespring 24. I'he sealing ring I'8 comprises an axially extending flangeportion 26 of substantial length with its outer pe- 40 riphery directlyengaging the outer periphery of the shaft I6. The ring I8 is alsoprovided with a substantially radially extending flange portion 28, theouter end of which extends in a direction toward the free end of theflange 26 and bears 'against the inner periphery of the outer casing I2.In other words, the sealing ring I8 is pro-v vided with two flangeshaving 4an arcuate angle therebetween.

The spacer ring 20 has anges 30 and 32, one

ofwhich 38 parallels the outer casing I 2 and rests against the innerperiphery thereof ,and the other flange 82 extends radially toward theshaft I6, `forming an4 acuteangle with the flange 38.

`'I'he ilange 32 has its outer'face in direct engagement with-the outerface of the sealing ring Il.

(ci. 28s- 1) The outer free end of the flange 30 abuts a radiallyextending flange 34 on the outer end of the wall I2. y

'I'he end wall of the housing I0 is reversely bent as at 36 overlappinga portion of the .wall I2 and isV extended inwardly and parallels theflange 28 of the sealing ring I8 for a short distance where it is againreversely bent as at 40 and parallels the wall I2 and reversely bentportion 36 to provide an annular space between the 10 portion 4|) andthe radially extendingflange 26 of the sealing I 8 for reception of thespring 24.

'I'he lower end of the wall, beyond the end of the portion 40, is formedZ-'shaped so that one arm of the Z provides an end wall for the spring24, and the other arm of the Z provides an end wall for the free end ofthe ange 26 of the sealing ring I8. The last mentioned arm of the Z isin substantially radial alignment with the inner I end of the reverselybent portion 36. The gen- 20 eral shape of the housing issubstalltiallyV rectangular, having a straight wall at I2 and twoinwardly pressed portions in its inner end wall, one portion serving asa means to compress the flange 2li-of the sealing ring I8 against theiiange 25 32 of the ring 20 and another portion providing va retainingwall for the spring 24.

The locking washer 22 is positioned between the end wall of the housingand the flange 28 and extends substantially parallel throughout its 30major portion ,to the ange 28, the inner end of the washer being flangedas at 42 extending toward the spring 24. This ange serves the .purposeof positioning the spring 24 at the free end of the flange 26.

By` the arrangement and design of the parts as above described I havebeen able` to provide a. (seal of minimum parts Iand. having a substan-,ti/ally wide bearing surface within the opening I4, a substantiallylong bearing portion on the 40 shaft I6, and a means for retaining' thespring 24 at the free end of the substantially long flange 26.

Various changes, including the size, shape and arrangement of parts,maybe made without de- 45 parting from the spirit of my invention and itis not my intention to limit its scope other than of said housing withits free edge in engagement with said radially extending ange, and adiagonal ange extending inwardly from the opposite edge of said lastnamed axially extending ange, a,v pliable angular member having anaxially extending flange and a diagonal ange extending outwardly inparallel relation to said Iirst named diagonal flange and in contacttherewith, a washer having a portion parallel to and in contact with thediagonal flange of said pliable member and an axially extending flangeparallel to but spaced from the axially extending ange of said pliablemember the end of which terminates short of the end of said axiallyextending ange of said pliable member, a coil spring around the axiallyextending flange of said pliable member beyond the axially extendingange of said washer, and a closed end portion on said housing having aportion in engagement with said Washer. f

2. A lubricant retainer comprising a. pliable packing member having anaxially extending ange and a radially extending ange, a. housing forsaid packing securing the radially extending ange of said packingbetween portions of said housing, a coil spring surrounding the axiallyextending portion of said packing, and axially extending means forpositioning said spring axially at the free end of said axiallyextending ange between said housing and the radially extending portionof said packing.

3. A lubricant retainer comprising a pliable packing member having anaxially extending flange and a radially extending flange, oppositelyarranged angular members on the opposite sides of said radiallyextending flange, one of said angular members having an axiallyextending flange surrounding and spaced from the axially extendingflange of said pliable member, a housing for said members having itsopposite end Walls in engagement with said angular members, and a coilspring within said housing surrounding the axially extending ange ofsaid pliable member and spaced axially between an end wall of saidhousing and the free end of the axially extending Aflange of one of theangular members.

SIMPSON C. LEONARD, JR.

